function bgImage() {
if(document.body) {
var bgImageTarget=document.body.style;
var bgImagePath="http://www.optimadesign.co.uk/images/backgrounds/bg"+rndNum(8)+".gif";
bgImageTarget.background="url("+bgImagePath+") no-repeat center top"; } }
function rndNum(n) {
return Math.floor(Math.random()*n)+1; }